**6. Cognitive domains in Capgras delusion: memory, executive impairment, and confabulation**

Neuropsychological deficits in patient with CS were reported across multiple cognitive domains, including memory, executive functioning, and visuospatial processing. These studies suggest that memory was statistically more likely to be impaired than other cognitive domains. Therefore, the memory may be playing an important role in the development of these delusions [32]. The existence of confabulations may have a role in prognosis and predicted significantly longer delusion duration, once more supporting the importance of memory impairment in patients with CS [32]. To mention a little more about the confabulation, some authors are focusing on confabulation in these patients because they are thought to be confabulation and delusion are closely related. When asked how they can explain their beliefs, Capgras patients will often confabulate. Confabulation is a kind of false memory that occurs when patients produce stories that fill in gaps in their memories, whereas a delusion is a mental state, typically thought of as a belief. Confabulation and delusion cannot be completely the same [37, 38]. Some researchers suggested that CS comes out when right hemisphere dysfunction causes a memory disconnection that leads to a failure to put new information together with representations about a significant individual and to keep in reserved over time [17]. Against all of these, although many patients have subtle deficits in face recognition and memory for faces, they do not have difficulty in recognizing faces in everyday life [1, 2]. CS is distinguished by its delusional mechanism: it is neither a hallucination nor an illusion—the object is correctly recognized in its appearance. CS is not a memory disorder. The person is correctly recognized; people are memorized [7]. Language deficits may not be absent, because of the right hemispherical dominance of the lesions [32].
